I have a young hippo tang that I have had for about 4-5 weeks. He is swimming and eating fine. But there is almost like this small bubble that is coming out of the bottom of it. I thought it was something to do with its intestines, but it is further back than where the poop <-- (lack of a better word) comes out. It seems to be doing fine. I feed once a day and I am starting today to feed once every 2 days. I have a queen angel and a percula clown and a cleaner shrimp that all seem to behaving normal.
Any advice would be much help.